RFC 7529
collective/icalendar#653 states that there are improvements to allow non-gregorian calendar scale event repetitions.
This should be supported.
Once the icalendar issue is closed, we can update this issue with what to test.
The calendar user agent can reject just the iCalendar components
containing an unrecognized "RSCALE" element or element value.
Note that any overridden components associated with those
rejected components MUST also be rejected (i.e., any other
components with the same "UID" property value as the one with the
unrecognized "RSCALE" element or element value).
See also:
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